AERCO Adding a Communications Board to ECS - Manual (Page 4)

4
NOTE
AERCO recommends that shielded, twisted-pair cable be
used for communication wiring. Examples of suitable wiring
are : Belden 9841, 8761, 3105A, or equivalent.
Figure 5
Table 1. Modbus Communication Signal Connections
COMPUTER CONTROL CABLE
2408 TEMP. CONTROLLER
RS232/9-PIN RS232/25-PIN RS485
SIGNAL
NAME PIN NO.
SIGNAL
NAME PIN NO. PIN NO. PIN NO.
GROUND HD GROUND 5 7 GROUND
RECEIVE HE TRANSMIT 3 2 A+
TRANSMIT HF RECEIVE 2 3 B-
4. After the appropriate wire leads have been connected, close and secure the swing-
down panel and close the Control Box door. This completes the installation of the
Communications Board.
5. For additional information and documentation on the 2408 Controller, refer to the
Eurotherm Website at the following address:
www.eurotherm.com/products/controllers/2400_doc.htm